package com.cainiao.util;



import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;


public class JsonUtil {

	// private static org.apache.commons.logging.Log log =
	// org.apache.commons.logging.LogFactory
	// .getLog(JsonUtil.class);
	//

	public static String object2json(Object obj) {
		StringBuilder json = new StringBuilder();
		if (obj == null) {
			json.append("null");
		} else if (obj instanceof String) {
			json.append("\"").append(string2json(obj.toString())).append("\"");
		} else if (obj instanceof Integer || obj instanceof Float
				|| obj instanceof Boolean || obj instanceof Short
				|| obj instanceof Double || obj instanceof Long
				|| obj instanceof BigInteger || obj instanceof Byte) {
			json.append(string2json(obj.toString()));
		} else if (obj instanceof BigDecimal) {
			Double dvalue = ((BigDecimal) obj).doubleValue();
			json.append(string2json(dvalue.toString()));
		} else if (obj instanceof java.sql.Date) {
			java.sql.Date d = (java.sql.Date) obj;
			Date date = new Date(d.getTime());
			SimpleDateFormat sf2 = new SimpleDateFormat("yyyy-MM-dd");
			// SimpleDateFormat sf2 = new
			// SimpleDateFormat("EEE MMM dd HH:mm:ss zzz+0800 yyyy",Locale.US);
			String sDate = sf2.format(date);
			json.append("\"").append(string2json(sDate)).append("\"");
		} else if (obj instanceof Object[]) {
			json.append(array2json((Object[]) obj));
		} else if (obj instanceof List) {
			json.append(list2json((List<?>) obj));
		} else if (obj instanceof Map) {
			json.append(map2json((Map<?, ?>) obj));
		} else if (obj instanceof Set) {
			json.append(set2json((Set<?>) obj));
		} else {
			json.append(bean2json(obj));
		}
		return json.toString();
	}

	public static String bean2json(Object bean) {
		StringBuilder json = new StringBuilder();
		json.append("{\n");
		PropertyDescriptor[] props = null;
		try {
			props = Introspector.getBeanInfo(bean.getClass(),
					bean.getClass().getSuperclass()).getPropertyDescriptors();
		} catch (IntrospectionException e) {
		}
		if (props != null) {
			for (int i = 0; i < props.length; i++) {
				try {
					String name = object2json(props[i].getName());
					String value = object2json(props[i].getReadMethod().invoke(
							bean));
					json.append(name);
					json.append(":");
					json.append(value);
					json.append(",\n");
				} catch (Exception e) {
				}
			}
			json.setCharAt(json.length() - 2, '\n');
			json.setCharAt(json.length() - 1, '}');
		} else {
			json.append("}");
		}
		return json.toString();
	}

	public static String list2json(List<?> list) {
		StringBuilder json = new StringBuilder();
		json.append("[");
		if (list != null && list.size() > 0) {
			for (Object obj : list) {
				json.append(object2json(obj));
				json.append(",");
			}
			json.setCharAt(json.length() - 1, ']');
		} else {
			json.append("\n]");
		}
		return json.toString();
	}

	public static String array2json(Object[] array) {
		StringBuilder json = new StringBuilder();
		json.append("[");
		if (array != null && array.length > 0) {
			for (Object obj : array) {
				json.append(object2json(obj));
				json.append(",");
			}
			json.setCharAt(json.length() - 1, ']');
		} else {
			json.append("\n]");
		}
		return json.toString();
	}

	public static String map2json(Map<?, ?> map) {
		StringBuilder json = new StringBuilder();
		json.append("{");
		if (map != null && map.size() > 0) {
			for (Object key : map.keySet()) {
				json.append(object2json(key));
				json.append(":");
				json.append(object2json(map.get(key)));
				json.append(",");
			}
			json.setCharAt(json.length() - 1, '}');
		} else {
			json.append("}");
		}
		return json.toString();
	}

	public static String mapList2json(List<Map<String, Object>> mapList) {
		StringBuilder json = new StringBuilder();
		json.append("[");
		if (mapList != null && mapList.size() > 0) {
			for (Map<?, ?> map : mapList) {
				json.append(map2json(map));
				json.append(",");
			}
			json.setCharAt(json.length() - 1, ']');
		} else {
			json.append("\n]");
		}
		return json.toString();
	}

	public static String set2json(Set<?> set) {
		StringBuilder json = new StringBuilder();
		json.append("[");
		if (set != null && set.size() > 0) {
			for (Object obj : set) {
				json.append(object2json(obj));
				json.append(",");
			}
			json.setCharAt(json.length() - 1, ']');
		} else {
			json.append("]");
		}
		return json.toString();
	}

	public static String string2json(String s) {
		if (s == null)
			return "";
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < s.length(); i++) {
			char ch = s.charAt(i);
			switch (ch) {
			case '"':
				sb.append("\\\"");
				break;
			case '\\':
				sb.append("\\\\");
				break;
			case '\b':
				sb.append("\\b");
				break;
			case '\f':
				sb.append("\\f");
				break;
			case '\n':
				sb.append("\\n");
				break;
			case '\r':
				sb.append("\\r");
				break;
			case '\t':
				sb.append("\\t");
				break;
			case '/':
				sb.append("\\/");
				break;
			default:
				if (ch >= '\u0000' && ch <= '\u001F') {
					String ss = Integer.toHexString(ch);
					sb.append("\\u");
					for (int k = 0; k < 4 - ss.length(); k++) {
						sb.append('0');
					}
					sb.append(ss.toUpperCase());
				} else {
					sb.append(ch);
				}
			}
		}
		return sb.toString();
	}
	public static Date stringToDate(String param, String dateFormat) {
		Date date = null;
		try {
			SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
			date = sdf.parse(param);
			return date;
		} catch (ParseException ex) {
			return null;
		}
	}
}